Electrical slip ring detection device

Abstract

An electrical slip ring detection device disclosed by the utility model comprises a driving assembly, a relay assembly, a resistance measuring device, a control assembly and a data analysis assembly, the driving assembly is in transmission connection with an electrical slip ring to drive the electrical slip ring to rotate, and the electrical slip ring, the relay assembly and the resistance measuring device are connected in series and in parallel through leads to form a closed loop. The relay assembly is electrically connected with the control assembly, the control assembly controls opening and closing of the relay assembly to achieve conduction between each channel and the resistance measuring device so as to measure the dynamic resistance of each channel, and the data analysis assembly receives data measured by the resistance measuring device and analyzes the data. According to the electrical slip ring detection device disclosed by the embodiment of the utility model, the dynamic resistance test of multiple channels of the electrical slip ring can be met, the control assembly and the relay assembly are matched, the automatic switching of detection loops of the channels is realized, the detection efficiency can be improved, the rapid test is realized, and the labor intensity can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, and more specifically, to an electrical slip ring detection device. Background Art

[0002] The electrical slip ring of a wind turbine generator set is a device that transmits control signals from the stationary nacelle to the rotating hub. Since the electrical slip ring is installed at the rear end of the gearbox, which is coaxial with the main shaft and the hollow shaft of the gearbox, lubricating oil leaking from the gearbox can easily enter the electrical slip ring, resulting in a high failure rate of the electrical slip ring.

[0003] Dynamic resistance is a key performance indicator of electrical slip rings, directly impacting their quality and performance. Dynamic resistance refers to the dynamic contact resistance between the brushes and the ring body. The dynamic resistance of an electrical slip ring can be used to predict its service life. Electrical slip rings consist of multiple channels. Existing methods for testing the dynamic resistance of electrical slip rings require workers to connect each channel individually using resistance measuring equipment and manually record the values, resulting in low testing efficiency.

[0004] Therefore, how to improve the detection efficiency of the dynamic resistance of electrical slip rings has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, an object of the present invention is to provide an electrical slip ring detection device to improve the detection efficiency of the dynamic resistance of the electrical slip ring.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An electrical slip ring detection device, the electrical slip ring includes N channels, and the electrical slip ring detection device includes a drive component, a relay component, a resistance measuring device, a control component and a data analysis component;

[0008] The driving assembly is connected to the electrical slip ring to drive the electrical slip ring to rotate;

[0009] Electrical slip rings, relay components and resistance measuring equipment are connected in series and parallel via wires to form a closed loop;

[0010] The relay assembly is electrically connected to the control assembly. The control assembly realizes conduction between each channel and the resistance measuring device by controlling the opening and closing of the relay assembly, so as to measure the dynamic resistance of each channel respectively.

[0011] The data analysis component receives and analyzes the data measured by the resistance measuring device.

[0012] Optionally, in the above-mentioned electrical slip ring detection device, the relay assembly includes a first relay unit and a second relay unit;

[0013] The first relay unit includes m first relays, the second relay unit includes n second relays, and the control component controls the i-th first relay and the j-th second relay to be turned on, and the remaining first relays and second relays to be turned off, so as to connect each channel to the resistance measuring device respectively.

[0014] Optionally, in the above-mentioned electrical slip ring detection device, each first relay includes a contacts, each contact is respectively connected to each channel of the electrical slip ring, so that the switching of the detection circuits of N channels is realized by opening and closing each contact, and each first relay is short-circuited together to form a first test point;

[0015] The bth contact of each first relay is short-circuited to form a bth short-circuit point, the bth second relay is connected to the corresponding bth short-circuit point, and each second relay is short-circuited together to form a second test point. The resistance measuring device is connected to the first test point and the second test point respectively.

[0016] Optionally, in the above-mentioned electrical slip ring detection device, the first relay and the second relay are both electromagnetic relays.

[0017] Optionally, in the above-mentioned electrical slip ring detection device, the driving component includes a driving motor, and the driving motor is transmission-connected to the electrical slip ring.

[0018] Optionally, in the above-mentioned electrical slip ring detection device, the driving motor is transmission-connected to the electrical slip ring via a gear assembly or a pulley assembly.

[0019] Optionally, in the above-mentioned electrical slip ring detection device, the drive motor is connected to the electrical slip ring transmission through a pulley assembly;

[0020] The pulley assembly includes a first pulley, a second pulley and a transmission belt. The drive motor is connected to the first pulley, the electrical slip ring is connected to the second pulley through a drive shaft, and the transmission belt is connected between the first pulley and the second pulley.

[0021] Optionally, in the above electrical slip ring detection device, the electrical slip ring detection device further includes a support assembly, and the support assembly includes:

[0022] The base, the drive motor and the pulley assembly are arranged on the base, and the drive shaft is rotatably connected to the base.

[0023] The support frame is arranged on the base, and the stator of the electrical slip ring is arranged on the support frame.

[0024] Optionally, in the above-mentioned electrical slip ring detection device, the drive shaft is connected to the electrical slip ring and the base through a bearing seat respectively.

[0025] Optionally, in the above-mentioned electrical slip ring detection device, the resistance measuring device includes a multimeter.

[0026] As can be seen from the above scheme, the electrical slip ring detection device disclosed in the embodiment of the present invention is simple to operate, stable and reliable, can simulate the normal operating state of the electrical slip ring, and can meet the dynamic resistance test of multiple channels of the electrical slip ring. The control component and the relay component cooperate to realize automatic switching of the detection circuit of each channel, realize automation of the measurement process, improve detection efficiency, realize rapid testing of the dynamic resistance of multiple channels of the electrical slip ring, reduce labor intensity, and reduce measurement errors caused by manual measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic structural diagram of a drive assembly and a support assembly of an electrical slip ring detection device disclosed in an embodiment of the present utility model;

[0029] Figure 2 This is a schematic structural diagram of a detection circuit of a detection device for an electrical slip ring disclosed in an embodiment of the present utility model;

[0030] Figure 3 A schematic diagram of a relay output circuit of an electrical slip ring detection device disclosed in an embodiment of the present utility model;

[0031] Figure 4 A schematic diagram of an input signal of an electrical slip ring detection device disclosed in an embodiment of the present utility model;

[0032] Figure 5 This is a data analysis diagram of the data analysis component disclosed in an embodiment of the present utility model.

[0033] Among them, 10 is an electrical slip ring, 20 is a drive motor, 30 is a relay assembly, 31 is a first relay unit, 32 is a second relay unit, 40 is a resistance measuring device, 50 is a support assembly, 51 is a base, and 52 is a support frame;

[0034] 100 is the first test point, and 200 is the second test point. DETAILED DESCRIPTION

[0035] Related explanation:

[0036] Electrical slip ring: a device that transmits power, electrical energy and signals from a fixed device to a rotating device.

[0037] The core of the utility model is to disclose an electrical slip ring detection device to improve the detection efficiency of the dynamic resistance of the electrical slip ring.

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] The embodiment of the utility model discloses an electrical slip ring detection device, which includes a drive component, a relay component 30, a resistance measuring device 40, a control component and a data analysis component.

[0040] It should be noted that the electrical slip ring 10 includes a rotor and a stator. In actual operation, the rotor is in a rotating state and the stator is in a stationary state. The electrical slip ring 10 includes N channels, where N is a positive integer.

[0041] like Figure 1 As shown, the driving component is connected to the electrical slip ring 10 in a transmission manner to drive the electrical slip ring 10 to rotate, simulating the working state of the electrical slip ring 10 during actual operation. The electrical slip ring 10, the relay component 30 and the resistance measuring device 40 are connected in series and parallel through wires to form a closed loop. The relay component 30 is electrically connected to the control component. The control component realizes the conduction of each channel with the resistance measuring device 40 by controlling the opening and closing of the relay component 30 to form the switching of the detection circuit of N channels. Specifically, it can be done by timed switching or other switching methods. The data analysis component receives the dynamic resistance data measured by the resistance measuring device 40 and performs corresponding analysis. It can predict the service life of the electrical slip ring 10 and achieve the purpose of preventive maintenance. The data analysis component is preferably a computer with a built-in data analysis program in the computer. Figure 5 Schematic diagram of data analysis by data analysis components.

[0042] During actual detection, the control component controls the opening and closing of the relay component 30 to connect each channel to the resistance measuring device 40, forming detection loops for each of the N channels to measure the dynamic resistance of each channel.

[0043] The electrical slip ring detection device disclosed in the embodiment of the present utility model is simple to operate, stable and reliable, can simulate the normal operating state of the electrical slip ring, and can meet the requirements of dynamic resistance testing of more than 10 channels of the electrical slip ring. The control component and the relay component 30 cooperate to realize automatic switching of the detection circuits of N channels, realize automation of the measurement process, improve detection efficiency, realize rapid testing of the dynamic resistance of multiple channels of the electrical slip ring, reduce labor intensity, and reduce measurement errors caused by manual measurement.

[0044] The electrical slip ring detection device disclosed in the embodiments of the present invention can be applied to wind turbine pitch control systems, as well as other scenarios requiring dynamic resistance measurement of electrical slip rings 10. The data analysis component can analyze a large amount of test data from various types of electrical slip rings 10 to identify the slip ring most suitable for a specific site, thereby improving equipment reliability and reducing unit failure rates.

[0045] In order to ensure the stability and reliability of the electrical slip ring measuring device, in some specific embodiments, the relay assembly 30 includes a first relay unit 31 and a second relay unit 32, the first relay unit 31 includes m first relays, and the second relay unit 32 includes n second relays. The control component controls the i-th (i≤m) first relay in the first relay unit 31 and the j-th (j≤n) second relay in the second relay unit 32 to be connected in series, and the remaining first relays and second relays are disconnected, so that each channel is connected in series with the resistance measuring device 40, respectively, to form a detection loop for each of the N channels.

[0046] To reduce the complexity of the electrical slip ring detection system, each first relay includes a contacts, where the product of a and n equals N (the number of channels). Each contact is connected to the corresponding channel via a wire, forming a switching circuit for each of the N channels. That is, one contact is connected in series with one channel, and one contact corresponds to the detection circuit for each channel. The bth contact of each first relay is short-circuited to form the bth short-circuit point (b ≤ a), and the bth second relay is connected in series with the corresponding bth short-circuit point. The first relays are short-circuited together to form a first test point 100, and the second relays are short-circuited together to form a second test point 200. The input of the resistance measuring device 40 is connected to the first test point 100 and the second test point 200, respectively. The output of the resistance measuring device 40 is connected to the control component.

[0047] like Figure 2As shown in the figure, an electrical slip ring 10 including 21 channels is used for illustration, wherein the first relay unit 31 includes 7 first relays, namely K11, K12, K13, K14, K15, K16, and K17, and the second relay unit 32 includes 3 second relays, namely K21, K22, and K23. Each first relay includes three contacts, and the first contacts of the seven first relays are respectively short-circuited to form a first short-circuit point, the second contacts are respectively short-circuited to form a second short-circuit point, and the third contacts are respectively short-circuited to form a third short-circuit point. K21 is connected to the first short-circuit point, K22 is connected to the second short-circuit point, and K23 is connected to the third short-circuit point.

[0048] During use, when the control component controls K11 and K21 to close, the remaining first relays and second relays are disconnected. At this time, the first channel is connected to the resistance measuring device 40 to form a detection loop for the first channel, and the dynamic resistance of the first channel is measured by the resistance measuring device 40; when the control component makes K11 and K22 closed, the remaining first relays and second relays are disconnected. At this time, the second channel is connected to the resistance measuring device 40 to form a detection loop for the second channel, and the resistance measuring device 40 measures the dynamic resistance of the second channel; when the control component makes K11 and K23 closed, the remaining first relays and second relays are disconnected. At this time, the third channel is connected to the resistance measuring device 40 to form a detection loop for the third channel, and the resistance measuring device 40 measures the dynamic resistance of the third channel; the dynamic resistance measurement principle of the remaining channels is the same as above and will not be repeated here. Figure 3 and Figure 4 This is a schematic diagram of the relay output circuit and input signal.

[0049] In the electrical slip ring measuring device disclosed in the embodiment of the utility model, the first relay and the second relay are used in coordination, which can reduce the complexity of the system and improve the reliability and stability of the system.

[0050] In some specific embodiments, the first relay and the second relay are both electromagnetic relays. Electromagnetic relays have low control current, long control distance, no mutual interference, and reliable operation.

[0051] like Figure 1 As shown, in some specific embodiments, the drive assembly includes a drive motor 20, which is transmission-connected to the electrical slip ring 10, specifically to the rotor, to drive the rotor to rotate. The drive motor 20 is preferably a three-phase asynchronous motor. The speed of the electrical slip ring 10 can be adjusted to keep consistent with the speed under actual working conditions, so as to simulate the working state of the electrical slip ring 10 during actual operation, thereby improving the detection accuracy.

[0052] Specifically, the drive motor 20 is connected to the electrical slip ring 10 through a gear assembly or a pulley assembly. In some specific embodiments, the drive motor 20 is connected to the electrical slip ring 10 through a pulley assembly. Specifically, the pulley assembly includes a first pulley, a second pulley, and a transmission belt. The output shaft of the drive motor 20 is connected to the first pulley, and the electrical slip ring 10 is connected to the second pulley through a drive shaft. The transmission belt is connected between the first pulley and the second pulley. The rotation of the drive motor 20 drives the first pulley to rotate, thereby driving the second pulley to rotate. The second pulley drives the drive shaft to rotate, and the drive shaft drives the electrical slip ring 10 to rotate. Specifically, the drive shaft is connected to the electrical slip ring 10 through a connector. In some specific embodiments, the connector is a bent piece, which is respectively connected to the electrical slip ring 10 and the drive shaft.

[0053] like Figure 1 As shown, in some specific embodiments, the electrical slip ring detection device further includes a support assembly 50. Specifically, the support assembly 50 includes a base 51 and a support frame 52. The drive motor 20 and the pulley assembly are mounted on the base 51. The drive shaft is rotatably connected to the base 51. The drive motor 20 is connected to the base via bolts. The support frame 52 is mounted on the base 51, specifically by welding or by connecting members. The stator of the electrical slip ring 10 is mounted on the support frame 52, which supports the stator. Specifically, the support frame 52 can be a V-shaped support frame.

[0054] In order to reduce friction, in some specific embodiments, the driving assembly further includes a bearing seat, and the driving shaft is connected to the electrical slip ring 10 and the base 51 respectively through the bearing seat.

[0055] In the electrical slip ring detection device disclosed in the embodiment of the present invention, the electrical measuring device 40 includes a multimeter. The two ends of the multimeter are respectively connected to a first test point 100 and a second test point 200. The dynamic resistance of each channel measured by the multimeter can be transmitted to a data analysis component to facilitate data analysis.

[0056] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0057] As used in this application and the claims, unless the context clearly indicates an exception, the terms "a," "an," "an," and / or "the" are not intended to refer to the singular and may include the plural, unless the context clearly indicates otherwise. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements. The phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, product, or apparatus that includes the elements.

[0058] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0059] Unless otherwise specified or limited, the terms "connected" and "connection" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the embodiments of the present invention based on their specific circumstances.

[0060] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help you understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An electrical slip ring detection device, characterized in that: The electrical slip ring (10) includes N channels, and the electrical slip ring detection device includes a drive component, a relay component (30), a resistance measuring device (40), a control component, and a data analysis component; The driving assembly is in transmission connection with the electrical slip ring (10) to drive the electrical slip ring (10) to rotate; The electrical slip ring (10), the relay assembly (30) and the resistance measuring device (40) are connected in series and parallel via wires to form a closed loop; The relay component (30) is electrically connected to the control component, and the control component realizes conduction between each of the channels and the resistance measuring device (40) by controlling the opening and closing of the relay component (30), so as to measure the dynamic resistance of each of the channels respectively; The data analysis component receives the data measured by the resistance measuring device (40) and performs analysis.

2. The electrical slip ring detection device according to claim 1, characterized in that: The relay assembly (30) includes a first relay unit (31) and a second relay unit (32); The first relay unit (31) includes m first relays, the second relay unit (32) includes n second relays, and the control component controls the i-th first relay and the j-th second relay to be turned on, and the remaining first relays and second relays to be turned off, so as to respectively connect the respective channels to the resistance measuring device (40).

3. The electrical slip ring detection device according to claim 2, wherein: Each of the first relays comprises a contacts, each of the contacts being connected to each of the channels of the electrical slip ring, so as to switch the detection circuits of N channels by opening and closing the contacts, and each of the first relays being short-circuited together to form a first test point (100); The bth contact of each of the first relays is short-circuited to form a bth short-circuit point, the bth second relays are respectively connected to the corresponding bth short-circuit point, each of the second relays is short-circuited together to form a second test point (200), and the resistance measuring device (40) is respectively connected to the first test point (100) and the second test point (200).

4. The electrical slip ring detection device according to claim 3, characterized in that: The first relay and the second relay are both electromagnetic relays.

5. The electrical slip ring detection device according to claim 1, wherein: The drive assembly comprises a drive motor (20), and the drive motor (20) is transmission-connected to the electrical slip ring (10).

6. The electrical slip ring detection device according to claim 5, characterized in that: The drive motor (20) is transmission-connected to the electrical slip ring (10) via a gear assembly or a pulley assembly.

7. The electrical slip ring detection device according to claim 6, characterized in that: The drive motor (20) is connected to the electrical slip ring (10) via a pulley assembly; The pulley assembly comprises a first pulley, a second pulley and a transmission belt, the drive motor (20) is connected to the first pulley, the electrical slip ring (10) is connected to the second pulley via a drive shaft, and the transmission belt is connected between the first pulley and the second pulley.

8. The electrical slip ring detection device according to claim 7, characterized in that: The electrical slip ring detection device further comprises a support assembly (50), wherein the support assembly (50) comprises: A base (51), the driving motor (20) and the pulley assembly are arranged on the base (51), and the driving shaft is rotatably connected to the base (51). A support frame (52), wherein the support frame (52) is arranged on the base (51), and the stator of the electrical slip ring (10) is arranged on the support frame (52).

9. The electrical slip ring detection device according to claim 8, characterized in that: The drive shaft is connected to the electrical slip ring (10) and the base (51) respectively through a bearing seat.

10. The electrical slip ring detection device according to any one of claims 1 to 9, characterized in that: The resistance measuring device (40) includes a multimeter.

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